TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook DG-TT7-K, Руководство по эксплуатации

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MULTIXPLO AND MULTITOX DETECTORS
OPERATING MANUAL
NOSP17665
Revision 02a
19
4.3.1 Connection of the electrical ground braid
Use a shield connection clamp (not supplied) to connect the shielding of the cable to the electric
ground of the housing (see § below).
4.3.2 Grounding
A M4 screw passes through the body of the enclosure, enabling the electronic ground of the
housing to be connected to the local ground.
It is recommended to use a yellow / green wire with a ring lug (section ≥ other wire and ≥1.5
mm²). The armour of the power cable is normally connected to the ground of the detector, but it
may depend on site practices.
4.3.3 Connection
There are three different cabling:
•
3-wires connection (source):
-
The output current is not isolated from power supply, provided from detector
(standard connection).
•
3-wires connection (sink):
-
The output current is not isolated from power supply, consumed by the detector
•
4-wires connection:
-
The output current is isolated from power supply
NB: The power potentials are isolated from the electric ground of the housing.
Total loop resistance:
Whatever the power supply type (3 wires source or sink, 4 wires), the total loop resistance
(re cable) should not exceed the following value:
mA 22
V 8 tage supply vol Power
maxi R
−
=
The total loop resistance should not exceed 700
Ω
with a voltage of 24Vdc